Mobile terminal capable of removing echo and echo removing method thereof

Abstract

The invention discloses a mobile terminal capable of removing echo and an echo removing method thereof. The mobile terminal capable of removing the echo comprises a loudspeaker, a microphone, an inverter, an audio processing unit and a signal superposition module. The loudspeaker makes a sound on the basis of a first audio signal generated by the audio processing unit, the inverter inverts the first audio signal, and the signal superposition module is used for receiving a second audio signal acquired by the microphone, performing superposition on the first audio signal inverted by the inverter and the second audio signal and sending the first audio signal and the second audio signal to the audio processing unit. The mobile terminal capable of removing the echo removes the echo through subtraction audio signals of sound played by the loudspeaker from the acquired audio signals. The mobile terminal capable of removing the echo adjusts audio signals acquired by the microphone and subtracted from the audio signals of the sound played by the loudspeaker through an amplitude adjusting module, thereby being capable of removing the echo thoroughly.

Description

Technical field [0001] The present invention relates to a mobile terminal for filtering sound and a method for filtering sound, in particular to a mobile terminal for filtering echo and a method for filtering echo. Background technique [0002] At present, most mobile devices have a call function, and mobile calls can be seen everywhere in people's lives. Devices with a call function often have a hands-free call function, which is to play the voice of the other party through the speaker and collect their own voice through the microphone. Among them, the volume of the loudspeaker is often relatively large, so that when the user keeps a certain distance from the communication device, the voice information can still be transmitted well. [0003] However, due to the small size of mobile devices, the distance between the speaker and the microphone is generally very close. At the same time, considering the factors of beauty and ease of operation, the distance between the speaker and the...

AI Technical Summary

Problems solved by technology

[0003] However, due to the small size of mobile devices, the distance between the speaker and the microphone is generally very close. At the same time, considering the factors of aesthetics and ease of operation, the distance between the speaker and the microphone may be less than a certain safety distance

This will cause the voice of the other party to come out from the speaker and into the microphone during the call, and then the voice of the other party will be transmitted back to the other party’s device, causing the other party to hear their own voice, and the speaker and microphone at this time The sound signal can also produce self-excited phenomenon, which will produce howling in a short time, affect the normal call, and even cause adverse effects on the health of users

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